ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

CreateIcon must perform color depth conversion if the provided bitmap 

is not of the same depth as the screen.
Added some documentation.
This commit is contained in:
François Gouget 2001-02-13 01:48:14 +00:00 committed by Alexandre Julliard
parent eb2e0de75e
commit 2c86506164
1 changed files with 87 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
windows/cursoricon.c
View File

@ -1130,25 +1130,99 @@ HICON16 WINAPI CreateIcon16( HINSTANCE16 hInstance, INT16 nWidth,
/***********************************************************************
* CreateIcon (USER32.@)
*
* Creates an icon based on the specified bitmaps. The bitmaps must be
* provided in a device dependent format and will be resized to
* (SM_CXICON,SM_CYICON) and depth converted to match the screen's color
* depth. The provided bitmaps must be top-down bitmaps.
* Although Windows does not support 15bpp(*) this API must support it
* for Winelib applications.
*
* (*) Windows does not support 15bpp but it supports the 555 RGB 16bpp
* format!
*
* BUGS
*
* - The provided bitmaps are not resized!
* - The documentation says the lpXORbits bitmap must be in a device
* dependent format. But we must still resize it and perform depth
* conversions if necessary.
* - I'm a bit unsure about the how the 'device dependent format' thing works.
* I did some tests on windows and found that if you provide a 16bpp bitmap
* in lpXORbits, then its format but be 565 RGB if the screen's bit depth
* is 16bpp but it must be 555 RGB if the screen's bit depth is anything
* else. I don't know if this is part of the GDI specs or if this is a
* quirk of the graphics card driver.
* - You may think that we check whether the bit depths match or not
* as an optimization. But the truth is that the conversion using
* CreateDIBitmap does not work for some bit depth (e.g. 8bpp) and I have
* no idea why.
* - I'm pretty sure that all the things we do in CreateIcon should
* also be done in CreateIconIndirect...
*/
HICON WINAPI CreateIcon( HINSTANCE hInstance, INT nWidth,
INT nHeight, BYTE bPlanes, BYTE bBitsPixel,
LPCVOID lpANDbits, LPCVOID lpXORbits )
HICON WINAPI CreateIcon(
HINSTANCE hInstance, /* the application's hInstance, currently unused */
INT nWidth, /* the width of the provided bitmaps */
INT nHeight, /* the height of the provided bitmaps */
BYTE bPlanes, /* the number of planes in the provided bitmaps */
BYTE bBitsPixel, /* the number of bits per pixel of the lpXORbits bitmap */
LPCVOID lpANDbits, /* a monochrome bitmap representing the icon's mask */
LPCVOID lpXORbits /* the icon's 'color' bitmap */
)
{
CURSORICONINFO info;
HICON hIcon;
HDC hdc;
TRACE_(icon)("%dx%dx%d, xor=%p, and=%p\n",
nWidth, nHeight, bPlanes * bBitsPixel, lpXORbits, lpANDbits);
nWidth, nHeight, bPlanes * bBitsPixel, lpXORbits, lpANDbits);
info.ptHotSpot.x = ICON_HOTSPOT;
info.ptHotSpot.y = ICON_HOTSPOT;
info.nWidth = nWidth;
info.nHeight = nHeight;
info.nWidthBytes = 0;
info.bPlanes = bPlanes;
info.bBitsPerPixel = bBitsPixel;
hdc=GetDC(0);
if (!hdc)
return 0;
return CreateCursorIconIndirect16( 0, &info, lpANDbits, lpXORbits );
if (GetDeviceCaps(hdc,BITSPIXEL)==bBitsPixel) {
CURSORICONINFO info;
info.ptHotSpot.x = ICON_HOTSPOT;
info.ptHotSpot.y = ICON_HOTSPOT;
info.nWidth = nWidth;
info.nHeight = nHeight;
info.nWidthBytes = 0;
info.bPlanes = bPlanes;
info.bBitsPerPixel = bBitsPixel;
hIcon=CreateCursorIconIndirect16( 0, &info, lpANDbits, lpXORbits );
} else {
ICONINFO iinfo;
BITMAPINFO bmi;
iinfo.fIcon=TRUE;
iinfo.xHotspot=ICON_HOTSPOT;
iinfo.yHotspot=ICON_HOTSPOT;
iinfo.hbmMask=CreateBitmap(nWidth,nHeight,1,1,lpANDbits);
bmi.bmiHeader.biSize=sizeof(bmi.bmiHeader);
bmi.bmiHeader.biWidth=nWidth;
bmi.bmiHeader.biHeight=-nHeight;
bmi.bmiHeader.biPlanes=bPlanes;
bmi.bmiHeader.biBitCount=bBitsPixel;
bmi.bmiHeader.biCompression=BI_RGB;
bmi.bmiHeader.biSizeImage=0;
bmi.bmiHeader.biXPelsPerMeter=0;
bmi.bmiHeader.biYPelsPerMeter=0;
bmi.bmiHeader.biClrUsed=0;
bmi.bmiHeader.biClrImportant=0;
iinfo.hbmColor = CreateDIBitmap( hdc, &bmi.bmiHeader,
CBM_INIT, lpXORbits,
&bmi, DIB_RGB_COLORS );
hIcon=CreateIconIndirect(&iinfo);
DeleteObject(iinfo.hbmMask);
DeleteObject(iinfo.hbmColor);
}
ReleaseDC(0,hdc);
return hIcon;
}